A seamless pattern formed from a sports car on clker.com. To get the tile, select the rectangle in Inkscape and use shift+alt+i.
Source Firkin
An alternative colour scheme to the original seamless pattern.
Source Firkin
A comeback for you: the popular Escheresque, now in black.
Source Patten
This reminds me of Game Cube. A nice light 3D cube pattern.
Source Sander Ottens
Same classic 45-degree pattern, dark version.
Source Luke McDonald
One more from Badhon, sharp horizontal lines making an embossed paper feeling.
Source Badhon Ebrahim
Zero CC tileable hard cover cells book texture, 4k, scanned and made by me. CC0
Source Sojan Janso
A seamless texture traced from an image on opengameart.org shared by Scouser.
Source Firkin
A very dark spotted twinkle pattern for your twinkle needs.
Source Badhon Ebrahim
This ladies and gentlemen, is texturetastic! Love it.
Source Adam Pickering
The green fibers pattern will work very well in grayscale as well.
Source Matteo Di Capua
The image depicts a seamless pattern which was made using stripe-like things including borders.I used OCAL cliparts called "Blue Greek Key With Lines Border" uploaded by "GR8DAN" and "daisy border" uploaded by "johnny_automatic".Thanks.
Source Yamachem
Different from the original in being a simple tile stored as a pattern definition, rather than numerous repeated objects. Hence easy and quick to give this pattern to objects of different shapes. To get the tile in Inkscape, select the rectangle and use shift+alt+i.
Source Firkin
Remixed from a drawing in 'Sun Pictures of the Norfolk Broads', Ernest Suffling, 1892.
Source Firkin
You can never get enough of these tiny pixel patterns with sharp lines.
Source Designova
Adapted from a drawing in 'Line and form', Walter Crane, 1914.
Source Firkin
A seamless pattern recreated from an image on Pixabay. It is reminiscent of parquet flooring and is formed from a square tile, which can be recovered in Inkscape by selecting the ungrouped rectangle and using shift-alt-I together.
Source Firkin
Sort of like the back of a wooden board. Light, subtle, and stylish, just the way we like it!
Source Nikolalek
Simple gray checkered lines, in light tones.
Source Radosław Rzepecki
Prismatic Abstract Geometric Background 5
Source GDJ